3D Bomb Alley is another three-dimensional program from Software Invasion, with graphics almost as good as those of Attack On Alpha Centauri.
Your task in this game is to protect a fleet of ships from attacks by a number of relentless fighter aircraft. You control a battery of ground-to-air missiles, using either joysticks or the keyboard.
This might sound easy, but wait until there are four or five bombers coming at you at once. This is a very addictive game and is good value for money.